引抜材の機械的性質に関する研究

抄録

This paper deals with the experimental research on the effects of change of wire drawing condition on hardness distribution over the section of drawn wire.
Using a Micro-Vickers hardness tester, we tried to investigate the hardness distribution over the cross section of three kinds of carbon steel wires and a brass wire, drawn under several kinds of drawing conditions, as well as the gradual change of hardness over the longitudinal section of carbon steel wires under plastic deformation with half drawn specimen.
As the results we have make it clear that the wire with uniform deformation as possible will be obtained by following methods of drawing:
(1) with the die of larger radius of curvature of drawing surface than with the die of smaller radius,
(2) under high reduction of diameter than low reduction.